25205155 has 8 divisors (see below), whose sum is σ = 30414384. Its totient is φ = 20052000.

The previous prime is 25205149. The next prime is 25205161. The reversal of 25205155 is 55150252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25205149) and next prime (25205161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25205155 - 2¹⁵ = 25172387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13021 + ... + 14830.

It is an arithmetic number, because the mean of its divisors is an integer number (3801798).

Almost surely, 2^25205155 is an apocalyptic number.

25205155 is a deficient number, since it is larger than the sum of its proper divisors (5209229).

25205155 is a wasteful number, since it uses less digits than its factorization.

25205155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28037.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 25205155 is about 5020.4735832389. The cubic root of 25205155 is about 293.1994316828.

The spelling of 25205155 in words is "twenty-five million, two hundred five thousand, one hundred fifty-five".